From the age of 4, the hydrolipidic film of children's skin is in full construction. The skin is therefore more vulnerable to external aggressions and it is 3 times thinner than that of an adult. The dermis is immature with small spaced cells which intensify water loss and ultimately dehydration of the child's skin.
In addition, the sebaceous glands which participate in the creation of the hydrolipidic film and which make it possible to fight against the drying of the skin are not very active.
In summary, the skin of children is particularly sensitive and fragile and requires a daily routine including hydration and protection.